Attempted - the number of items attempted (pages attempted to be
fetched, items sent for replication, etc).

Saved - the number of successful items

Errors - the number of items that encountered an error

Bytes - the number of bytes transferred or processed

TodoCurrent - the number of items to do at the current depth

TodoNext - the number of items to do at the next depth

LoadAttempted1Min - the average items per minute attempted, weighted towards the last minute

LoadSaved1Min - the average items per minute saved, weighted towards the last minute

LoadAttempted15Min - the average items per minute attempted, weighted towards the last 15 minutes

LoadSaved15Min - the average items per minute saved, weighted towards the last 15 minutes

LoadAttempted1Hour - the average items per minute attempted, weighted towards the last hour

LoadSaved1Hour - the average items per minute saved, weighted towards the last hour

getTask retrieves information about a specific task that is running or
has been run. The id likely comes from a previous getTasks call, where
checking again can be done more efficiently by giving the id exactly rather than
the same criteria to getTasks.